Emulation of a Quantum Spin with a Superconducting Phase Qudit

• DOI: 10.1126/science.1173440
• Publication Date: 2009-08-06T21:31:34Z
• Authors: Matthew Neeley; Markus Ansmann; Radoslaw C. Bialczak; Max Hofheinz; Erik Lucero; Aaron D. O'Connell; Daniel Sank; Haohua Wang; James Wenner; Andrew N. Cleland; Michael R. Geller; John M. Martinis
• Keywords: Parity (physics)

In quantum information processing, qudits (d-level systems) are an extension of qubits that could speed up certain computing tasks. We demonstrate the operation a superconducting phase qudit with number levels d to = 5 and show how manipulate measure state, including simultaneous control multiple transitions. used emulate dynamics single spins principal s 1/2, 1, 3/2, allowing measurement Berry's even parity integer (and odd half-integer spins) under 2pi-rotation. This two-level qubit multilevel holds promise for more-complex computational architectures richer simulations mechanical systems.